CVE-2026-48819

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 27.8% of scored records. A rank, not a probability.

NVD base score

4.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

NVD analysis status

Deferred. NVD last modified this record on 2026-07-23.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-17 19:46Z1 MO AGO

Last updated

2026-07-20 16:24Z1 MO AGO

Reserved

2026-05-22

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Weaknesses

• CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')Variant

Data version

5.2

Document digest

62c086c403bfdcde65fa7d95beb53e0a9b19701787e74d2475f72e2fef9ed23d

• github.comhttps://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rwx_refsource_CONFIRM
• github.comhttps://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214fx_refsource_MISC
• github.comhttps://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169x_refsource_MISC
• github.comhttps://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3x_refsource_MISC